CVE-2026-39873

The issue was addressed with improved memory handling

Critical · published July 27, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
47.2
In the wild
Unconfirmed
What it is

The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Connecting to a malicious SMB server may lead to unexpected system termination.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00585 · 47.2th percentile
Published
2026-07-27T20:14Z
EPSS history
Timeline
  • 27 JUL 20:14Z
    The issue was addressed with improved memory handling
    cvelistv5